1035 Password (20)

#include <stdio.h>
#include <string.h>
struct MyStruct
{
    char ID[11];
    char Password[11];
    bool changed;
};
int main()
{
    int n,i,j;
    MyStruct User[1001];
    while(scanf("%d",&n)!=EOF)
    {
        for(i=0;i<n;i++)
            User[i].changed=false;
        int count = 0;
        for(i=0;i<n;i++)
        {
            getchar();
            scanf("%s %s",User[i].ID,User[i].Password);
            int fir=1;
            for(j=0;j<strlen(User[i].Password);j++)
            {
            
                if(User[i].Password[j]=='1'||User[i].Password[j]=='0'||User[i].Password[j]=='l'||User[i].Password[j]=='O')
                {
                    if(fir) 
                    {
                        fir=0;
                        ++count;
                    }
                    if(User[i].Password[j]=='1') User[i].Password[j]='@';
                    else if(User[i].Password[j]=='0') User[i].Password[j]='%';
                    else if(User[i].Password[j]=='l') User[i].Password[j]='L';
                    else if(User[i].Password[j]=='O') User[i].Password[j]='o';
                    User[i].changed=true;
                }
    
            }
        }

        if(count>0) 
        {
            printf("%d
",count);
             for(i=0;i<n;i++)
                 if(User[i].changed)
                     printf("%s %s
",User[i].ID,User[i].Password); 
        }
        else
        {
            if(n==1) printf("There is 1 account and no account is modified
");
            else printf("There are %d accounts and no account is modified
",n);
        }
    }
    return 0;
}